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EMPLOYEE BENEFIT PLANS (Details 8) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 0 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Minimum | Dec. 31, 2012 Yellow Zone Hawaii Stevedoring Multiemployer Retirement Plan | Dec. 31, 2011 Yellow Zone Hawaii Stevedoring Multiemployer Retirement Plan | Dec. 31, 2010 Yellow Zone Hawaii Stevedoring Multiemployer Retirement Plan | Dec. 31, 2012 Yellow Zone Hawaii Terminals Multiemployer Pension Plan | Dec. 31, 2011 Yellow Zone Hawaii Terminals Multiemployer Pension Plan | Dec. 31, 2010 Yellow Zone Hawaii Terminals Multiemployer Pension Plan | Dec. 31, 2012 Green Zone Master, Mates and Pilots | Dec. 31, 2011 Green Zone Master, Mates and Pilots | Dec. 31, 2010 Green Zone Master, Mates and Pilots | Dec. 31, 2012 Green Zone MEBA Pension Trust | Dec. 31, 2012 Green Zone OCU Trust Pension | Dec. 31, 2011 Green Zone OCU Trust Pension | Dec. 31, 2010 Green Zone OCU Trust Pension | Dec. 31, 2012 Multiemployer Benefit Pension Plans item | Dec. 31, 2012 Multiemployer Benefit Pension Plans Contract A item | Jun. 15, 2012 Multiemployer Benefit Pension Plans Contract B item | Dec. 31, 2012 Multiemployer Benefit Pension Plans Red Zone Maximum | Dec. 31, 2012 Multiemployer Benefit Pension Plans Yellow Zone Maximum | Dec. 31, 2012 Multiemployer Benefit Pension Plans Green Zone Minimum | Dec. 31, 2012 Multiemployer Benefit Postretirement Plans item | Dec. 31, 2011 Multiemployer Benefit Postretirement Plans | Dec. 31, 2010 Multiemployer Benefit Postretirement Plans
Multiemployer Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of multiemployer plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 |  |  |  |  |  | 7 |  |
Funded status of multiemployer plan (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65.00% | 80.00% | 80.00% |  |  |
Contributions | $ 13.1 | $ 10.5 | $ 10.2 |  | $ 2.4 | $ 2.2 | $ 2.0 | $ 5.1 | $ 5.2 | $ 5.2 | $ 3.4 | $ 3.0 | $ 2.9 | $ 2.1 | $ 0.1 | $ 0.1 | $ 0.1 |  |  |  |  |  |  | $ 10.8 | $ 10.7 | $ 10.5
Amortization period provided by Public Law to amortize losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29 years |  |  |  |  |  |  |  |
Number of collective-bargaining agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Number of vessels covered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 | 1 |  |  |  |  |  |
Employer matching contribution to MEBA Pension Trust (as a percent) |  |  |  | 11.70% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold of total contributions for which planned years are disclosed (as a percent) |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the percentage of employees' gross pay for which the employer contributes a matching contribution to a defined benefit plan. + References No definition available. + Details
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- Definition Represents the funded status of a multiemployer plan. + References No definition available. + Details
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- Definition The amortization period provided by Public Law 111-192, section 211 for amortization of losses. + References No definition available. + Details
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- Definition Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450691-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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- Definition Percentage of contributions required by a collective bargaining arrangement to all contributions required of an employer related to a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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